Malicious PDF — malware analysis report

Static analysis result for SHA-256 90b1b2ea01c216e2…

MALICIOUS

PDF

73.8 KB Created: 2021-05-16 03:52:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 16f056f6d3bb748d6b0418662a183952 SHA-1: 81de8c352961634ab3d09de85366ca84c617c828 SHA-256: 90b1b2ea01c216e29398c71dd85fc2b2a718144908c75bf2980172957f2a0a27
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded URLs pointing to other PDF files hosted on various websites, suggesting a multi-stage attack. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware delivery. While no scripts were directly extracted, the presence of embedded URLs and the nature of the detection point towards a malicious document designed to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://cashmeredreams.com/wp-content/plugins/super-forms/uploads/php/files/f58c3d594239f716adc50cc5867295b1/96299459189.pdf
    • https://centrobrands.com/wp-content/plugins/super-forms/uploads/php/files/fd4b3aa3cf8ae17bcc6b75c6eb00c11d/surovegugakuxusodevifulos.pdf
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16083e107137db---61096339552.pdf
    • https://leesman.com/wp-content/plugins/super-forms/uploads/php/files/fda3bad49326c735146d183ec2264802/jowogibekipuzenonasuwar.pdf
    • http://apricomm.com/userData/board/file/xuxifibuzemofinagi.pdf
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607c944988f8a---luwetevobi.pdf
    • http://asupuro.com/user_data/image//file/38066459051.pdf
    • http://alituncer.com/userfiles/file/61532572034.pdf
    • https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/ae5953e976e8c453ea88d68ee589b69c/76835912502.pdf
    • https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609e161055879---43907308310.pdf
    • http://lycee-elm.org/userfiles/file/69240877007.pdf
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/qp59u69s2bta6nl8dum84oput7/45273466837.pdf
    • http://akkoryazilim.com/userfiles/file/84062660391.pdf
    • http://strandedtattoo.net/file/wopefujupe.pdf
    • https://wccia-vastu.com/wp-content/plugins/super-forms/uploads/php/files/b6f84dd2a663cf9e91904dfd1297067c/38410296661.pdf
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160919c98e3011---taxijuv.pdf
    • https://awlights.com/wp-content/plugins/super-forms/uploads/php/files/2b56b05364d2a5174eb168d4f7e3a96d/75031126604.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=bezubaan+ishq+full+movie+720p
    • https://bxthirteen.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/9d829b2c80abc3666191314c3051b271/galofejit.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d360.bin
c030ba5aaa4a36afa324d9706a5d9392474d4c8f5314d714c9d8e432fe56857a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD360 5628 bytes
font_01_sfnt_off0000e66f.bin
3ebaffb77eb684680d9795faea2aedf0ed3dc8c7fb08d5bf9267a6b7fbcd7c49		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE66F 10972 bytes
font_02_sfnt_off00010bf5.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10BF5 4324 bytes

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